Status of the Multi-layer Active target for MoNA Experiment (MAME)

The MoNA Collaboration uses the invariant mass technique to study neutron-unbound systems at the Facility for Rare Isotope Beams (FRIB) which started operation on May 10, 2022. The production cross section for such systems is of order of 0.1-1.0 mb which led this Collaboration to develop a silicon-beryllium based active segmented target to increase its yield and resolution of the reconstructed decay energy. However, the 140 mm thick silicon detectors have limitations from current saturation and radiation damage, typical for these solid-state devices, thus preventing to benefit fully from the high FRIB beam rates. Investigation of a gas-filled time projection chamber coupled to a gaseous electron multiplier (GEM) is under development to address this issue. This Multi-layer Active Target for MoNA Experiment (MAME) is expected to enable missing mass capability by tracking all the reaction products (neutrons and fragments from the decay of the unbound isotopes as well as recoils) and use the scalable readout system (SRS) data acquisition system for the readout of its high channel density. The status of this target will be reviewed and discussed.